MAX15049

PRODUCTION

Triple-Output Buck Controllers with Tracking/Sequencing

Low-Cost Triple Buck Controllers with Sequencing and Tracking in Small Form Factor (5mm x 5mm)

Data Sheet (Rev. 0) Product Selection Table

Part Models: 2
1ku List Price: Starting From $4.24

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Overview

4.7V to 23V or 5V ±10% Input Voltage Range
Triple-Output Synchronous Buck Controllers with 120° Out-of-Phase Operation
Prebias Power-Up (MAX15049)
Output Voltage Adjustable Down to 0.6V
Coincident/Ratiometric Tracking (MAX15048)
Accurate Sequencing Through Enable Threshold (MAX15049)
External Compensation for Maximum Flexibility
Digital Soft-Start (MAX15048/MAX15049) and Soft-Stop (MAX15048)
Lossless Valley-Mode Current Sensing Using R_DS(ON) of the Low-Side MOSFET
PGOOD Output
Integrated Bootstrap Diodes
Programmable Switching Frequency from 200kHz to 1.2MHz
Thermal Shutdown and Hiccup Mode Short-Circuit Protection
Space-Saving (5mm x 5mm), 32-Pin TQFN Package

The MAX15048/MAX15049 are triple-output pulse-width modulated (PWM), step-down, DC-DC controllers with tracking (MAX15048) and sequencing (MAX15049) options. The devices operate over the 4.7V to 23V input-voltage range. Each PWM controller provides an adjustable output down to 0.6V and delivers up to 15A of load current with excellent load and line regulation. The MAX15049 can start into prebiased outputs. The MAX15048/MAX15049 are optimized for high-performance, small-size power-management solutions.

The options of coincident or ratiometric tracking (MAX15048) or output sequencing (MAX15049) allow the tailoring of the power-up/power-down sequence depending on the system requirements. Each of the MAX15048/MAX15049 PWM sections utilizes a voltage-mode control scheme with external compensation, allowing for good noise immunity and maximum flexibility with a wide selection of inductor values and capacitor types. Each PWM section operates at the same fixed switching frequency that is programmable from 200kHz to 1.2MHz. Each converter, operating at up to 1.2MHz with 120° out-of-phase, increases the input capacitor ripple frequency up to 3.6MHz, reducing the RMS input ripple current and thus the size of the input bypass capacitor significantly. The MAX15048/MAX15049 integrate boost diodes for additional system cost savings.

The MAX15048/MAX15049 include internal undervoltage lockout (UVLO) with hysteresis and digital soft-start (MAX15048/MAX15049)/soft-stop (MAX15048) for glitch-free power-up and power-down of the converter. The power-good circuitry (PGOOD) monitors all three outputs and provides a power-good signal to the system control/processor when all outputs are within regulation. Protection features include lossless valley-mode current limit, hiccup mode output short-circuit protection, and thermal shutdown.

The MAX15048/MAX15049 are available in space-saving, 5mm x 5mm, lead-free, 32-pin TQFN-EP packages and are specified for operation over the -40°C to +85°C extended temperature range.

Applications

ASIC/CPU/DSP Core and I/O Voltages
Base-Station Power Supplies
DDR Power Supply
Point-of-Load DC-DC Converters
RAID Control Power Supplies
Set-Top Boxes
Telecom and Networking Power Supplies

Part Models: 2
1ku List Price: Starting From $4.24

Documentation

Data Sheet 1

MAX15048-MAX15049: Triple-Output Buck Controllers with Tracking/Sequencing Data Sheet (Rev.0) 02/23/2010

Technical Articles 2

Power-Supply Solutions for Altera FPGAs 04/24/2012

Power-Supply Solutions for Xilinx FPGAs 04/24/2012

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.

Part Model	Pin/Package Drawing	Documentation	CAD Symbols, Footprints, and 3D Models
MAX15049ETJ+	32-LFCSP-5X5X0.75	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
MAX15049ETJ+T	32-LFCSP-5X5X0.75	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Jun 20, 2016 - 1612 ASSEMBLY
		pcn_1612
MAX15049ETJ+	PRODUCTION	pcn_1612

This is the most up-to-date revision of the Data Sheet.

Software Resources

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Hardware Ecosystem

Parts	Product Life Cycle	Description
Switching Regulators & Controllers 1
MAX15003	PRODUCTION	Triple-Output Buck Controller with Tracking/Sequencing

Evaluation Kits

Evaluation Kit for the MAX15049

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Features and Benefits

Triple-Output Power Supply
- VOUT1 (3.3V, 3A)
- VOUT2 (1.8V, 3A)
- VOUT3 (1.2V, 6A)
5.5V to 16V Input-Voltage Operation (Design Optimized for 12V Input)
Optional 4.5V to 5.5V Input-Voltage Operation
500kHz Switching Frequency per Converter
Programmable Switching Frequency Up to 1.2MHz
Sequencing Operation (Tracking Possible with Component Changes)
PGOOD Power Monitoring
Small 1.5in x 1in Circuit Footprint
92.8% Peak Efficiency for OUT1
Fully Assembled and Tested

Product Details

The MAX15049 evaluation kit (EV kit) is a fully assembled and tested PCB that demonstrates the capabilities of the MAX15049. The MAX15049 is a high-performance, triple-output synchronous buck controller with sequencing capability. The EV kit requires a 5V to 16V (12V, typ) DC input-voltage range for normal operation.

The MAX15049 EV kit outputs are configured for 3.3V, 1.8V, and 1.2V. They provide a load current of 3A, 3A, and 6A, respectively. The EV kit's switching frequency is set to 500kHz, but can be programmed up to 1.2MHz by replacing a resistor. The EV kit comes configured for sequencing (MAX15049) and is capable of prebias startup. The EV kit can also be used to evaluate the MAX15048 for tracking applications by changing a few components. The PGOOD logic signal output pad is provided for circuit monitoring.

The MAX15049 EV kit comes with a MAX15049ETJ+ installed. To evaluate the MAX15048, contact the factory for samples of the pin-compatible MAX15048ETJ+.